[Vimpulse] Bug: Visual selection and W at the end of the line

[Alessandro Piras]

there are some problems with visual selection and W (and maybe other
motions that go past the end of the line). Two examples:
`|' represents the cursor.

----BoB ----
asdf asdf asdf |asdf
asdf asdf asdf asdf
----EoB ----
vW~
----BoB ----
asdf asdf asdf |ASDF
Asdf asdf asdf asdf
----EoB ----

the A on the second line shouldn't be affected, but it is.